The HATI (High Accuracy Timing IP) is a FPGA core intended to enable sub-nanosecond synchronization accuracy to a third-party hardware when it is connected to a Orolia’s device by using 1G/10G optical fibre links. The core is based on IEEE-1588, Sync-E and precise clock compensation to achieve it. This design is integrable in optical 1G/10G ethernet links without requiring any external hardware.